PCPartPicker part list:
http://pcpartpicker.com/p/2Qx11
Price breakdown by merchant: http://pcpartpicker.com/p/2Qx11/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2Qx11/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($119.99 @ Newegg)
Motherboard: ASRock 970 PRO3 R2.0 ATX AM3+ Motherboard ($64.99 @ Newegg)
Memory: Crucial Ballistix Sport 8GB (1 x 8GB) DDR3-1600 Memory ($76.24 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($81.97 @ Amazon)
Video Card: Asus Radeon R9 270X 2GB Video Card ($222.98 @ SuperBiiz)
Case: Thermaltake Commander MS/I Snow Edition (White/Black) ATX Mid Tower Case ($34.99 @ Microcenter)
Power Supply: Corsair Builder 500W 80+ Bronze Certified ATX Power Supply ($29.99 @ Newegg)
Total: $621.15
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-10 00:07 EST-0500)
Gave you a better cpu and mobo for gaming, different case, good GPU and a PSU that can power everything. It's a little over $300 more but worth it.